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| Northwest Africa 12786 | |||||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 12786 This is an OFFICIAL meteorite name. Abbreviation: NWA 12786 Observed fall: No Year found: 2018 Country: Morocco Mass:  422 g | ||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 6 approved meteorites classified as L4-melt breccia. [show all] Search for other: L chondrites, L chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||||
| Comments: | Approved 18 Apr 2020 | ||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 109:
Northwest Africa 12786 (NWA 12786) Morocco Purchased: 2018 Classification: Ordinary chondrite (L4, melt breccia) History: (Ziyao Wang) Purchased by Ziyao Wang from Fayssal Mezgouri in Agadir, Morocco, Nov 2018. Physical characteristics: (Ziyao Wang) one 422 g gray, flat stone Petrography: (R. Bartoschewitz, Bart) meteorite show two lithologies: a) recrystallized matrix with chondrules of 0.2-1.5 mm (POP, PP, RP), metal and sulfide grains; and b) recrystallized fine grained (~50 µm) melt. Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine Fa24.2±0.9 (n=13); pyroxene Fs20.2±6.2Wo1.5±0.2 (n=7); chromite CRAL87, FFM88; Cl-apatite and merrillite. Kamacite Ni=3.6-6.4, Co=0.8-1.0 (n=3); taenite Ni=30-33, Co=0.3 (n=4) (all wt%); troilite. Magnetic susceptibility (R. Bartoschewitz, Bart) log χ (× 10-9 m3/kg) = 4.57. Classification: Ordinary chondrite (L4-melt breccia, W2) Specimens: 21.9 g at Kiel on deposit, Ziyao Wang holds the main mass and 53 g with Bart. | ||||||||||||||||||||||||||||||||
| Data from: MB109 Table 0 Line 0: |
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| Institutions and collections |
Kiel: Geologisches und Mineralogisches Museum, Institut für Geowissenschaften, Christian-Albrechts-Universität Kiel, Ludewig-Mayn-Str. 10, D-24118 Kiel, Germany, Germany (institutional address; updated 13 Sep 2013) Bart: Bartoschewitz Meteorite Laboratory, Weiland 37, D-38518 Gifhorn, Germany; Website (private address; updated 30 Nov 2019) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography:
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Statistics: This is 1 of 1670 approved meteorites from Morocco (plus 23 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||||